13.13Test DataWeave output indirectly

Suppose input:

{
  "customerId": "C001",
  "companyName": "Acme",
  "phone": null
}

Production transformation should create:

{
  "External_Customer_ID__c": "C001",
  "Name": "Acme"
}

without:

Phone

How do you test it?

One approach:

mock Salesforce
but inspect what Mule attempted to send

Depending on flow design, you can:

Spy processor
capture variables
test transformation subflow

or separate DataWeave enough that the transformation can be tested cleanly.